mount is the tool to use to test pnfs which is the base infrastructure upon which files are registered and moved with Dcache. Only the admin node needs to mount the pnfs system nativity.
#mount /dev/hda1 on / type ext3 (rw) none on /proc type proc (rw) none on /dev/pts type devpts(rw,gid=5,mode=620) usbdevfs on /proc/bus/usb type usbdevfs(rw) none on /dev/shm type tmpfs (rw) /dev/hda5 on /tmp type ext3 (rw) /dev/hda3 on /var type ext3 (rw) localhost:/fs on /pnfs/fs type nfs(rw,udp,intr,noac,hard,addr=127.0.0.1)